WEST HOLLYWOOD, Calif. (AP) - Paris Hilton is being investigated for suspicion of petty theft, authorities said. "There was an incident, and she is alleged to have taken something," sheriff's Deputy Steve Suzuki said without disclosing further details. Calls to Hilton's publicist, Gina Hoffman, were not immediately returned. On its Web site, the TV show "Celebrity Justice" posted a security video taken last month of Hilton as she bought several magazines at a newsstand and was given change. It goes on to show her grabbing her infamous sex video and walking off with it. Gerry Castro, an employee at Swing...